BTSC encoder

Details BTSC encoder BTSC encoder

1998-03-12

2000-09-12

Lee, Ping

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

381 4, 348738, 348481, H03G 300

Patent

active

061188794

ABSTRACT:
The disclosed BTSC encoder includes a left high pass filter means for receiving a digital left channel audio signal and for digitally high pass filtering the digital left channel audio signal and thereby generating a digital left filtered signal; a right high pass filter means for receiving a digital right channel audio signal and for digitally high pass filtering the digital right channel audio signal and thereby generating a digital right filtered signal; a matrix means for receiving the digital left and digital right filtered signals, and including means for summing the digital left and digital right filtered signals and thereby generating a digital sum signal, and including means for subtracting one of the digital left and digital right filtered signals from the other of the digital left and digital right filtered signals and thereby generating a digital difference signal; a difference channel processing means for digitally processing the digital difference signal; and a sum channel processing means for digitally processing the digital sum signal.

REFERENCES:
patent: 4425665 (1984-01-01), Stauffer
patent: 4539526 (1985-09-01), Davis
patent: 5732106 (1998-03-01), Rasmussen et al.
Rashid, Muhammad H., "SPICE for Circuits and Electronics Using PSpice", 1990.
FCC, Multichannel Television Sound Transmission and Audio Processing Requirements for the BTC System (OET Bulletin No. 60, Revision A, Feb. 1986.
Electronic Industries Association, Multichannel Television Sound BTSC System Recommended Practices (EIA Television Systems Bulletin No. 5, Jul. 1985).

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